Set permalink structure

permalink-blueprint.json

{
    "landingPage": "/category/uncategorized/",
    "phpExtensionBundles": [
        "kitchen-sink"
    ],
    "features": {
        "networking": true
    },
    "steps": [
        {
            "step": "login"
        },
        {
            "step": "writeFile",
            "path": "/wordpress/wp-content/mu-plugins/rewrite.php",
            "data": "<?php add_action( 'after_setup_theme', function() { global $wp_rewrite; $wp_rewrite->set_permalink_structure('/%postname%/'); $wp_rewrite->flush_rules(); } );"
        }
    ]
}